package main

import (
	"fmt"
)

func f()  {
	fmt.Print("here!")
}

func n()  {
	fmt.Print("do nothing!")
}

func main() {
	var1 := 1
	switch var1 {
	case 1: // 空分支
		fallthrough
	case 2:
		fallthrough
	case 3:
		f()
	default:
		n()
	}
}

